Added serialization to protobufs for property trees.

cc/proto/gfx_conversions.h

Index: cc/proto/gfx_conversions.h
diff --git a/cc/proto/gfx_conversions.h b/cc/proto/gfx_conversions.h
index 5b5c31551869f806406a28c20e2c7ca09c6d1a2d..8c5e84e46eb4e82025b55bad8d3dbe5df8e50e7d 100644
--- a/cc/proto/gfx_conversions.h
+++ b/cc/proto/gfx_conversions.h
@@ -12,9 +12,11 @@ class Point;
 class PointF;
 class Rect;
 class RectF;
+class ScrollOffset;
 class Size;
 class SizeF;
 class Transform;
+class Vector2dF;
 }
 
 namespace cc {
@@ -24,9 +26,11 @@ class Point;
 class PointF;
 class Rect;
 class RectF;
+class ScrollOffset;
 class Size;
 class SizeF;
 class Transform;
+class Vector2dF;
 }
 
 // TODO(dtrainor): Move these to a class and make them static
@@ -53,6 +57,15 @@ CC_EXPORT void TransformToProto(const gfx::Transform& transform,
                                 proto::Transform* proto);
 CC_EXPORT gfx::Transform ProtoToTransform(const proto::Transform& proto);
 
+CC_EXPORT void Vector2dFToProto(const gfx::Vector2dF& vector,
+                                proto::Vector2dF* proto);
+CC_EXPORT gfx::Vector2dF ProtoToVector2dF(const proto::Vector2dF& proto);
+
+CC_EXPORT void ScrollOffsetToProto(const gfx::ScrollOffset& scroll_offset,
+                                   proto::ScrollOffset* proto);
+CC_EXPORT gfx::ScrollOffset ProtoToScrollOffset(
+    const proto::ScrollOffset& proto);
+
 }  // namespace cc
 
 #endif  // CC_PROTO_GFX_CONVERSIONS_H_